Lithium Hydroxide → cis(+/-)-2-(4-{[(4-Chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-ethoxypiperidin-1-yl)-4-[(2-fluoroethyl)carbamoyl]-1,3-thiazole-5-carboxylic acid

HRID 43954Notes

Reaction equation

HRID 43954 reaction equation
[OH-].[Li+].[Cl:3][C:4]1[N:5]=[C:6]([C:11]([NH:13][C@H:14]2[CH2:19][CH2:18][N:17]([C:20]3[S:21][C:22]([C:31]([O:33]CC)=[O:32])=[C:23]([C:25](=[O:30])[NH:26][CH2:27][CH2:28][F:29])[N:24]=3)[CH2:16][C@H:15]2[O:36][CH2:37][CH3:38])=[O:12])[NH:7][C:8]=1[CH2:9][CH3:10]>CO>[Cl:3][C:4]1[N:5]=[C:6]([C:11]([NH:13][C@H:14]2[CH2:19][CH2:18][N:17]([C:20]3[S:21][C:22]([C:31]([OH:33])=[O:32])=[C:23]([C:25](=[O:30])[NH:26][CH2:27][CH2:28][F:29])[N:24]=3)[CH2:16][C@H:15]2[O:36][CH2:37][CH3:38])=[O:12])[NH:7][C:8]=1[CH2:9][CH3:10]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 86648837Ethyl cis(+/-)-2-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-ethoxypiperidin-1-yl)-4-[(2-fluoroethyl)carbamoyl]-1,3-thiazole-5-carboxylate

Product 1

HCID 86648838cis(+/-)-2-(4-{[(4-Chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-ethoxypiperidin-1-yl)-4-[(2-fluoroethyl)carbamoyl]-1,3-thiazole-5-carboxylic acidYield 41.7%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A 2 N aqueous lithium hydroxide solution (1.92 mL, 3.83 mmol) was added to a solution of ethyl cis(±)-2-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-ethoxypiperidin-1-yl)-4-[(2-fluoroethyl)carbamoyl]-1,3-thiazole-5-carboxylate obtained in Example (250a) (209 mg, 0.38 mmol) in methanol (4 mL) at room temperature, followed by stirring for 4.5 hours. The reaction solution was concentrated under reduced pressure, and then a 1 N aqueous hydrochloric acid solution was added to the resulting residue. The aqueous layer was extracted with ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate and filtered, and then the filtrate was concentrated under reduced pressure. The resulting solid was suspended and washed in diethyl ether to obtain 82 mg of the title compound as a milk white solid (41%).

Workup

  1. concentrationThe reaction solution was concentrated under reduced pressure
  2. additiona 1 N aqueous hydrochloric acid solution was added to the resulting residue
  3. extractionThe aqueous layer was extracted with ethyl acetate
  4. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationthe filtrate was concentrated under reduced pressure
  7. washwashed in diethyl ether

Sources & evidence

ORD record
ord-d422f83e2257485ca6a7392534c5cd5c
Source dataset
uspto-grants-2013_09
Patent number
US08536197B2

Reaction notes

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